Re: ESP corruption bug - what CPUs are affected?

[Pavel Machek]

Hi!

> >for subsequent push/pop/call/ret operations.
> >But if code uses full ESP, thinking that upper 16 bits are zero,
> >it will crash badly. Correct me if I'm wrong.
> That's correct. But you should note that the
> program not just "thinks" that the upper 16 bits
> are zero. It writes zero there itself, and a few
> instructions later - oops, it is no longer zero...

Hmm, perhaps this can also be viewed as a "information leak"? Program
running under dosemu is not expected to know high bits of kernel
%esp...
								Pavel
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